Bug 39545 is an x86_64 ABI issue relating to the handling of structures
with flexible array members in function call and return. It seems likely
this corner case has bugs (and incompatibilities with other implementations)
for other targets as well. There should be gcc.dg/compat tests specifically
testing the ABI when structures with flexible array members, and unions
containing such structures, are passed to or returned from functions
(including passing through ... and va_arg), covering various cases for the
types of the initial elements and the flexible array members.
If we believe that [0] arrays (the old GNU extension) at the ends of structures
should be passed identically to [] arrays (C99 flexible array members), which
is probably a good idea, then there should be tests of this as well.
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Summary: compat tests for flexible array members
Product: gcc
Version: 4.4.0
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: testsuite
AssignedTo: unassigned at gcc dot gnu dot org
ReportedBy: jsm28 at gcc dot gnu dot org
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=39550
